The contact owns a 2019 GMC Sierra 1500. The contact stated that in the first month that the vehicle was purchased, the vehicle intermittently hesitated before slamming into gear hard. No warning lights were illuminated. The vehicle was taken to the dealer, and the contact was informed that the manufacturer was aware of the failure and suggested that a triple fluid flush was needed, and the…
2019 GMC Sierra powertrain problems
moderate 117 complaints filed with NHTSA · avg repair $2,500 · see powertrain across all vehicles →
Failure mileage
Complaints
117
Recalls
0
Avg fix
$2,500
1fire
1injury
When does it fail?
Of the 117 powertrain complaints filed for the 2019 GMC Sierra, here's the actual mileage breakdown — failures cluster heaviest at 0-25,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Owners have filed 117 powertrain complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
Among the 20 model years of GMC Sierra in our records for powertrain problems, this one ranks #3 by owner-complaint volume.
The failure pattern owners describe
2019 GMC Sierra owners report pervasive transmission and engine failures that dealers openly acknowledge as known issues but decline to remedy permanently. The 8-speed automatic transmission exhibits abrupt hard shifts, violent shuddering, and unintended downshifts—often without warning lights—starting as early as 5,500 miles and worsening to complete failure. Owners describe feeling the vehicle is being struck from behind; multiple transmission fluid flushes, valve body replacements, and software updates fail to resolve the problem. Some dealers told owners this behavior is "normal" and "working as designed," while a GM supervisor admitted transmission and engine issues were known but unfixed.
More critically, the transmission locks up at low speeds, causing rear wheels to seize and throwing occupants forward—one owner's face nearly hit the windshield at 6 mph. Replacement transmissions are on national backorder for two to five months; costs exceed $12,000. Engine seizures occur without warning, typically at highway speeds, with frozen bearings, failed lifters, or failed camshafts requiring full engine replacement ($10,800+). Oil cooler lines fail at the crimp joint, causing rapid oil loss; GM acknowledged this as a manufacturing defect but refuses reimbursement outside the 36,000-mile warranty. Owners with 47,000 to 86,000 miles report spending more than $20,000 on repairs, warranty claims denied after expiration, and no manufacturer support despite documented defects.
Same GMC Sierra powertrain reports on nearby years: 2017 · 2018 · 2020 · 2021 · 2022
Failure modes owners describe
8-speed transmission hard shifting, shuddering, and downshifting
Transmission exhibits abrupt hard shifts, shuddering, and unintended downshifts without warning lights. Multiple owners report the transmission shifting erratically between gears, hesitating on acceleration, and feeling like the vehicle is being hit from behind. Problem occurs at various speeds, from parking lots to highway driving. Many dealers acknowledge this as a known issue but offer no permanent fix.
When: Starts early in ownership, ranging from 5,500 miles to 30,000 miles; persists and worsens with mileage to 75,000+ miles
Symptoms owners cite: Hard, unexpected downshifts; Shuddering and jerking sensation; Hesitation on acceleration; Vehicle feels struck from behind; Abrupt gear changes with no warning lights; Clunky shifts between first and second gear; Transmission stuck in first gear with high RPM surging
Codes mentioned: P0011 (camshaft position), P25A2
Repairs/costs cited: Dealers perform transmission fluid and filter replacements ($500+), valve body replacements ($3,600–$8,660), transmission relearn procedures, and full transmission replacements (parts on national backorder for months); multiple repairs fail to resolve the issue. Some owners report out-of-pocket costs exceeding $20,000 after warranty expires.
Recalls/TSBs owners mention: GM acknowledges the issue as a known problem but claims no permanent remedy exists. Some dealers instructed not to attempt fixes. Dealer memo states this is 'normal for this model truck.' Transmission software updates offered but ineffective. Some owners mention recalls for 2020 models with same transmission but their 2019 units not included. CSP N212326940 addresses oil cooler lines, not transmission.
Rear wheel locking and transmission seizure at low speeds
Transmission locks up, causing rear wheels to lock, throwing occupants forward and creating imminent collision risk. Occurs without warning, typically at very low speeds (under 10 mph) or during parking lot maneuvers. Engine can seize, rendering vehicle immobile or forcing it into reverse to escape roadway.
When: Reported at various mileages: 40,000 miles, 45,000 miles; can occur suddenly with minimal warning
Symptoms owners cite: Rear wheels lock up suddenly; Vehicle stops abruptly without warning; Engine and transmission seize; Driver thrown forward into steering wheel; Vehicle unable to move forward from park or drive; Transmission stuck in drive position
Repairs/costs cited: Full transmission replacement required; parts on national backorder, extending repair timelines from 2+ months. Total repair costs exceed $12,000. Replacement transmissions sometimes arrive defective, requiring second replacement.
Recalls/TSBs owners mention: GM aware of defect; class action lawsuits filed by owners. Some owners mention recall expansion refused despite identical symptoms to recalled vehicles. No recall issued for affected 2019 models despite some vehicles matching symptoms of 2020 model recalls.
Engine seizure and loss of power at highway speeds
Engine suddenly loses all power while driving, typically at highway speeds, forcing vehicle to coast to safe location. Diagnosis reveals seized bearings in lower end, failed lifters, failed camshaft, or incomplete valve events. No prior warning signs in many cases.
When: Between 47,000 and 86,000 miles; some failures occur early without warning despite regular maintenance
Symptoms owners cite: Sudden complete loss of engine power; Check engine light and warning lights illuminate; Engine will not restart; Vehicle coasts to stop on roadway; Loud noise immediately before failure; Engine seized; bearings failed
Codes mentioned: P0011 (camshaft position interrupter magnet)
Repairs/costs cited: Full engine replacement required; cost $10,800–$16,500. Replacement engines scarce due to recalls on later model years. Some owners forced to wait several months for used engines from third-party suppliers. Metal shavings found in oil; some engines have misfire history before failure.
Recalls/TSBs owners mention: GM has open recall for 2021–2025 model years with same L87 engine; 2019 models still under investigation. Owners report GM knew of issue but did not notify 2019 owners. Warranty expired on many vehicles, leaving owners to cover full cost.
Oil cooler line failure and oil loss
Crimp joint between rubber hose and metal tubing on engine oil cooler line fails abruptly, causing rapid oil loss and risk of engine seizure from loss of oil pressure. Failure can occur at highway speeds, creating immediate safety hazard.
When: Occurs at 51,318 miles and beyond; manufacturing defect not dependent on mileage or age
Symptoms owners cite: Small to large oil leak on driveway or under vehicle; No warning lights or symptoms prior to failure; Rapid oil loss if line completely detaches
Repairs/costs cited: Line replacement required; part #85136335. Cost documented at $2,171.58 for repair. Part failure occurs despite proper maintenance.
Recalls/TSBs owners mention: GM acknowledged defect under Customer Satisfaction Program (CSP) N212326940; however, many VINs not included despite exhibiting identical failure. GM refuses reimbursement citing 36,000-mile warranty expiration, despite documenting defect as manufacturing issue, not wear-and-tear. Some owners report dealer confirmation of leak and safety hazard; GM still refuses coverage outside warranty.
Lifter and camshaft failure
Engine lifters and camshaft fail, causing misfires, rough running, cylinder shutdown, or complete engine seizure. Can occur without prior warning despite regular maintenance. Problem detected as cylinder 8 misfire code or discovered only after catastrophic engine failure.
When: Documented failures at 47,000 miles and 70,000 miles; early warning signs (ticking noise) may appear months before failure
Symptoms owners cite: Engine misfires (particularly cylinder 8); Rough idle and running; Vehicle jumps and shuts off while driving; Ticking noise from engine (described as 'GM tik'); Check engine light intermittent; Loss of power while driving; Metal shavings in oil
Codes mentioned: P0011 (camshaft position interrupter magnet), Cylinder 8 misfire
Repairs/costs cited: Full engine replacement required; cost $10,800+. Multiple repair attempts on fuel injectors, intake manifold gasket, ignition coils, and sensors do not resolve lifter/camshaft failure. Owners report spending $20,000+ on repairs without resolution.
Recalls/TSBs owners mention: Dealership initially denies problem exists while under warranty, citing diagnostics showing no issues. GM refuses warranty coverage once failure is confirmed and warranty expires. Some owners note GM investigating 2021–2025 models but 2019 models under separate investigation. No recall issued for 2019 models despite documented failures.
Transmission control module (TCM) malfunction and unintended shutdown
TCM malfunctions, causing transmission to attempt shutting down vehicle abruptly without warning. Vehicle comes to complete stop mid-driving, creating collision hazard. No warning lights in some cases; others show limp mode.
When: Occurs at various speeds; failure documented around 20,000–40,000 miles
Symptoms owners cite: Vehicle suddenly stops or nearly stops while driving; No warning prior to shutdown attempt; Shift lever unable to engage properly; Multiple push-start attempts required; Limp mode activation (once or twice monthly in some cases)
Repairs/costs cited: TCM replacement required. One owner paid $140/hour diagnostic fees totaling 12+ hours plus parts and labor; dealer did not cover under warranty.
Recalls/TSBs owners mention: Dealer instructed to replace TCM due to malfunction attempting to shut down truck. GM acknowledged this as a known issue but no recall issued.
Torque converter failure
Torque converter fails, causing transmission shuddering, hard shifting, and inability to shift properly. Failure often diagnosed after fluid flushes and software updates fail to resolve symptoms. Can occur shortly after transmission work.
When: Early in ownership; one case within 1,200 miles of purchase; another at 57,000 miles
Symptoms owners cite: Transmission shuddering; Hard, jerky acceleration; Transmission sluggish or unable to engage; Hesitation and jerking during acceleration
Repairs/costs cited: Torque converter replacement cost not consistently documented; one owner replaced torque converter only to find transmission subsequently required full replacement within months. Replacement parts on national backorder.
Recalls/TSBs owners mention: Some dealers replace torque converter under warranty (one case documented); others unable to order parts due to supply constraints. GM aware of issue but no systematic recall.
Drivetrain vibration and differential noise
Persistent vibrations in drivetrain while vehicle in motion; unusual noises from both front and rear differentials. Symptoms align with known recall for driveshaft issues.
When: Occurs during normal highway operation under load
Symptoms owners cite: Vibration under load on highway; Noise from front and rear differentials; Consistent unusual drivetrain vibration
Repairs/costs cited: Not repaired in reported case
Recalls/TSBs owners mention: Owner's VIN does not appear in official recall N202314870 despite exhibiting identical symptoms to recalled vehicles; owner requests VIN review and potential recall inclusion.
Synthesized from 117 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 3 most recent
Rear wheel brakes unexpectedly lock up after driving over a hour or more
Subject: Potential Issue Related to Recall N202314870 for GMC Sierra 1500 Problem Description: I own a 2019 GMC Sierra AT4 (VIN# [XXX] ) and have identified a potential issue related to the drive shaft. Although my VIN does not appear in the official system as affected by recall N202314870, the vehicle exhibits the following symptoms: 1. Unusual and consistent vibrations in the drivetrain…
Had powertrain trouble with your 2019 GMC Sierra?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the powertrain problem on the 2019 GMC Sierra?
It's a documented issue but not catastrophic. 117 complaints have been filed. Repairs average $2,500 and most owners catch it before it causes a breakdown.
At what mileage does the powertrain typically fail?
Across the 30 complaints that reported odometer mileage, most powertrain failures cluster between 5,255 and 56,000 miles, with the median around 31,050. A quarter of owners report trouble before 5,255; a quarter make it past 56,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $2,500 for powertrain repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to powertrain?
No active recalls currently cover powertrain issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2019/GMC/Sierra.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.